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Geotechnical and Geological Engineering

Erschienen in:

16.12.2016 | Original paper

Research on the Energy Criterion for Rockbursts Induced by Broken Hard and Thick Rock Strata and Its Application

verfasst von: Jun Wang, Jianguo Ning, Jinquan Jiang, Tengteng Bu, Xinshuai Shi

Erschienen in: Geotechnical and Geological Engineering | Ausgabe 2/2017

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Abstract

In this study, the occurrence conditions of rockbursts induced by broken hard and thick rock strata (HTRS) in fully mechanized longwall face are investigated by dividing the surrounding rock of a roadway rib into three zones: burst-resistance zone (BRZ), burst-inoculation zone, and stable zone. On this basis, the process of impact vibration energy (released by the broken HTRS) transformation in these zones was analyzed, and theoretical equations are presented to calculate the strain energy, dissipated energy and shock vibration energy. In addition, an energy criterion associated with the critical broken length of the HTRS, the width of burst-resistance zone, and the burst proneness index was proposed to predict rockbursts induced by broken HTRS in fully mechanized longwall face. Moreover, to control these types of rockbursts effectively, a quantitative method was proposed for determining the limit broken length of the HTRS and the BRZ. The research results show that the energy criterion may forecast these typical rockbursts, and rockburst hazards can be eliminated using the proposed method.

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Titel: Research on the Energy Criterion for Rockbursts Induced by Broken Hard and Thick Rock Strata and Its Application
verfasst von: Jun Wang
Jianguo Ning
Jinquan Jiang
Tengteng Bu
Xinshuai Shi
Publikationsdatum: 16.12.2016
Verlag: Springer International Publishing
Erschienen in: Geotechnical and Geological Engineering / Ausgabe 2/2017
Print ISSN: 0960-3182
Elektronische ISSN: 1573-1529
DOI: https://doi.org/10.1007/s10706-016-0137-0

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